On 10/10/2019 14:23, Mark Brown wrote:
On Thu, Oct 10, 2019 at 10:28:04AM +0100, Srinivas Kandagatla wrote:
On 09/10/2019 17:35, Mark Brown wrote:
On Wed, Oct 09, 2019 at 09:51:08AM +0100, Srinivas Kandagatla wrote:
+static const u8 wsa881x_reg_readable[WSA881X_CACHE_SIZE] = {
+static bool wsa881x_readable_register(struct device *dev, unsigned int reg)
+{
+ return wsa881x_reg_readable[reg];
There's no bounds check and that array size is not...
I converted this now to a proper switch statement as other drivers do.
+static struct regmap_config wsa881x_regmap_config = {
+ .reg_bits = 32,
+ .val_bits = 8,
+ .cache_type = REGCACHE_RBTREE,
+ .reg_defaults = wsa881x_defaults,
+ .num_reg_defaults = ARRAY_SIZE(wsa881x_defaults),
+ .max_register = WSA881X_MAX_REGISTER,
...what regmap has as max_register. Uusually you'd render as a
switch statement (as you did for volatile) and let the compiler
figure out a sensible way to do the lookup.
Sorry, I did not get your point here.
Are you saying that we can skip max_register in this regmap config ?
Then how would max_register in regmap be set?
I'm saying that you appear to be relying on max_register to
verify that you're not overflowing the array bounds but you
max_register is not set to the same thing as the array size.
Thanks for clarification, I have removed the readable array in new
version, removed multiple macros for max register and fixed max_register
to point to last register.
--srini
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